<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cartInfo in cartInfoList" :key="cartInfo.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked="cartInfo.isChecked==1?true:false" @change="modifyChecked(cartInfo,$event)"> 
          </li>
          <li class="cart-list-con2">
            <img :src="cartInfo.imgUrl">
            <div class="item-msg">{{cartInfo.skuName}}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{cartInfo.skuPrice}}</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="changeNum('minus',cartInfo.skuId,cartInfo.skuNum)">-</a>
            <input autocomplete="off" type="text" :value="cartInfo.skuNum" minnum="1" class="itxt" @change="customChangeNum(cartInfo.skuId,cartInfo.skuNum,$event)">
            <a href="javascript:void(0)" class="plus" @click="changeNum('add',cartInfo.skuId)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{cartInfo.skuNum * cartInfo.skuPrice}}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="deleteCart(cartInfo.skuId)">删除</a>
            <br>
            <a >移到收藏</a>
          </li>
        </ul>

      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" :checked="isAllChecked" @change="allCheckControl">
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteCheckedCart()">删除选中的商品</a>
        <a >移到我的关注</a>
        <a >清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{checkedNum}}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{totalPrice}}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapGetters, mapState } from 'vuex'
  export default {
    name: 'ShopCart',
    mounted(){
        this.getData()        
    },
    computed:{
      ...mapGetters('shopcart',['cartList']),
      //购物车数据
      cartInfoList(){
          return this.cartList.cartInfoList || []
      },
      //控制全选
      isAllChecked(){
        let isAllcheck=1;
        this.cartInfoList.forEach(element => {
            if(element.isChecked!=1){
                isAllcheck = 0 
            }
        });
        return isAllcheck==1?true:false
      },
      //计算已选几件商品
      checkedNum(){
        let checkNum=0;
        this.cartInfoList.forEach(element => {
            if(element.isChecked==1){
                checkNum++
            }
        });
        return checkNum
      },

      //计算总价
      totalPrice(){
        let totalPrice = 0
        this.cartInfoList.forEach(element =>{
          if(element.isChecked == '1') {
            let everyPrice = element.skuNum * element.skuPrice
            totalPrice+= everyPrice
          }
        })
        return totalPrice
      }
     
    },
    methods:{
      //派发actions
      getData(){
          this.$store.dispatch('shopcart/reqshopCartList')
      },
      //切换商品的选中状态
      async modifyChecked(cartInfo,event){
         const isChecked = event.target.checked?"1":"0"
        try{
          await  this.$store.dispatch('shopcart/reqCheckCart',{skuId:cartInfo.skuId,isChecked})
          this.getData()
        }catch{
          alert("切换选中状态失败")
        }
      },

      //全选的复选框
       async allCheckControl(e){
          const isChecked = e.target.checked?"1":"0"
            try{
              await this.$store.dispatch('shopcart/reqAllCheckCart',isChecked)
              this.getData()
            }catch {
              alert("操作失败")
            }
      },

      //删除商品
      async deleteCart(skuId){
        try {
          await this.$store.dispatch('shopcart/reqDeleteCart',{skuId})
          this.getData()
        }catch {
          alert("删除失败")
        }
      },

      //删除选中的商品
      async deleteCheckedCart(){
        let PromiseAll = []
        this.cartInfoList.forEach(element=>{
          if(element.isChecked == 1){
            const promise = this.$store.dispatch('shopcart/reqDeleteCart',{skuId:element.skuId})
            PromiseAll.push(promise)
          }
        })
        try{
            await Promise.all(PromiseAll)
            alert("删除成功")
            this.getData()
        }catch {
          alert("删除失败")
        }
      },

      //增加和减少一个商品数量
      async changeNum(mark,skuId,skuNum){
        switch(mark){
          case 'minus':
            if(skuNum>1){
              try {
                await this.$store.dispatch('detail/reqAddToCart',{skuId,skuNum:"-1"})
                this.getData()
              }catch {
                alert("减少一个商品数量失败")
              }
            }
            break;
          case 'add':
              try {
                await this.$store.dispatch('detail/reqAddToCart',{skuId,skuNum:"1"})
                this.getData()
              }catch {
                alert("增加一个商品数量失败")
              }
            break;
        }
      },
      //自定义修改商品数量
        async customChangeNum(skuId,skuNum,e){
          //收集用户输入的内容
          const str = e.target.value
          //正则匹配所有数字
          let mateNum = str.match(/[0-9]/g)
          //将匹配到的数组转为字符串
          mateNum = mateNum.join('')
          //如果第一个字符串为0，则将它割掉
          const lastMateNum = mateNum.replace(/^0/,"")
          //计算差值，用于传递给服务器
          const DifferenceNum = lastMateNum - skuNum
          try {
                await this.$store.dispatch('detail/reqAddToCart',{skuId,skuNum:DifferenceNum})
                this.getData()
              }catch {
                alert("自定义设置商品数量失败")
              }

        }
    }
  }
</script>

<style lang="less" scoped>
  .cart {
    width: 1200px;
    margin: 0 auto;

    h4 {
      margin: 9px 0;
      font-size: 14px;
      line-height: 21px;
    }

    .cart-main {
      .cart-th {
        background: #f5f5f5;
        border: 1px solid #ddd;
        padding: 10px;
        overflow: hidden;

        &>div {
          float: left;
        }

        .cart-th1 {
          width: 25%;

          input {
            vertical-align: middle;
          }

          span {
            vertical-align: middle;
          }
        }

        .cart-th2 {
          width: 25%;
        }

        .cart-th3,
        .cart-th4,
        .cart-th5,
        .cart-th6 {
          width: 12.5%;

        }
      }

      .cart-body {
        margin: 15px 0;
        border: 1px solid #ddd;

        .cart-list {
          padding: 10px;
          border-bottom: 1px solid #ddd;
          overflow: hidden;

          &>li {
            float: left;
          }

          .cart-list-con1 {
            width: 15%;
          }

          .cart-list-con2 {
            width: 35%;

            img {
              width: 82px;
              height: 82px;
              float: left;
            }

            .item-msg {
              float: left;
              width: 150px;
              margin: 0 10px;
              line-height: 18px;
            }
          }

          .cart-list-con3 {
            width: 10%;

            .item-txt {
              text-align: center;
            }
          }

          .cart-list-con4 {
            width: 10%;

          }

          .cart-list-con5 {
            width: 17%;

            .mins {
              border: 1px solid #ddd;
              border-right: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }

            input {
              border: 1px solid #ddd;
              width: 40px;
              height: 33px;
              float: left;
              text-align: center;
              font-size: 14px;
            }

            .plus {
              border: 1px solid #ddd;
              border-left: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }
          }

          .cart-list-con6 {
            width: 10%;

            .sum {
              font-size: 16px;
            }
          }

          .cart-list-con7 {
            width: 13%;

            a {
              color: #666;
            }
          }
        }
      }
    }

    .cart-tool {
      overflow: hidden;
      border: 1px solid #ddd;

      .select-all {
        padding: 10px;
        overflow: hidden;
        float: left;

        span {
          vertical-align: middle;
        }

        input {
          vertical-align: middle;
        }
      }

      .option {
        padding: 10px;
        overflow: hidden;
        float: left;

        a {
          float: left;
          padding: 0 10px;
          color: #666;
        }
      }

      .money-box {
        float: right;

        .chosed {
          line-height: 26px;
          float: left;
          padding: 0 10px;
        }

        .sumprice {
          width: 200px;
          line-height: 22px;
          float: left;
          padding: 0 10px;

          .summoney {
            color: #c81623;
            font-size: 16px;
          }
        }

        .sumbtn {
          float: right;

          a {
            display: block;
            position: relative;
            width: 96px;
            height: 52px;
            line-height: 52px;
            color: #fff;
            text-align: center;
            font-size: 18px;
            font-family: "Microsoft YaHei";
            background: #e1251b;
            overflow: hidden;
          }
        }
      }
    }
  }
</style>